EUVD-2026-45962
GHSA-p386-8623-243g
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Network REST reachable and low-complexity; PR:N because the self-registration path can be pre-auth, and self-promotion to admin yields full C:H/I:H/A:H.
Primary rating from Vendor (apache).
CVSS VectorVendor: apache
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
5DescriptionCVE.org
Improper Privilege Management vulnerability in Apache Syncope.
When:
- the all-Java user workflow adapter is configured, or
- the Flowable user workflow adapter is configured, bearing a BPMN definition not requiring admin approval for user self registration of self update requests
the following scenario could happen. A REST API call can allow the user to grant themselves one or more of defined Roles, thus gaining their Entitlements and becoming in fact an administrator; the actual Entitlements gained depend on the Roles that are effectively defined on the specific Syncope deployment.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
Articles & Coverage 4
AnalysisAI
Privilege escalation in Apache Syncope's identity-management engine lets a self-service user grant themselves defined Roles via a single REST API call, effectively promoting a low-privileged or newly self-registered account to administrator. It affects deployments running the all-Java user workflow adapter, or the Flowable adapter with a BPMN definition that does not require admin approval for self-registration or self-update, across versions 3.0.0-M0-3.0.16, 4.0.0-M0-4.0.6, and 4.1.0-M0-4.1.1. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the deployment to be configured with the all-Java user workflow adapter, OR the Flowable user workflow adapter with a BPMN definition that does NOT require admin approval for user self-registration or self-update. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H = 9.8) reflects network-reachable, low-complexity abuse yielding full administrative control, which is the worst-case ceiling. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | On a Syncope instance using the all-Java adapter (or a Flowable BPMN without admin approval), an attacker self-registers or authenticates as an ordinary user and submits a crafted REST self-registration/self-update request that includes one or more privileged Roles. Because the workflow does not strip or gate the Role assignment, the account is provisioned with those Roles' Entitlements, granting de facto administrator access; no public POC has been identified, but the low-complexity network vector makes exploitation straightforward for anyone who can reach the API. |
| Remediation | Vendor-released patch: upgrade to Apache Syncope 4.0.7 or 4.1.2, which fix the issue per the Apache advisory (https://lists.apache.org/thread/6r8cngvy43y2yk4jj3w060dt8vx0yzpr); 3.0.x deployments (through 3.0.16) should migrate to a fixed 4.0.7/4.1.2 release, as no fixed 3.0.x version is cited in the input. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Apache Syncope deployments and pinpoint instances running versions 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.6, or 4.1.0-M0 through 4.1.1; immediately disable self-service registration and self-update workflows if using the all-Java adapter or Flowable adapter without mandatory admin approval, and restrict REST API access to authorized administrators through network access controls. …
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External POC / Exploit Code
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